obama with 51% support compared to 44% for mitt romney. the president is now in one of those states nevada as he prepared for the first debate. susan has more on the debate preps. >> reporter: more than 11,000 people packed a high school in las vegas sunday night to listen to president obama. >> we'll win this election again. >> reporter: it was the last scheduled appearance before the first presidential debate on wednesday. >> governor romney is a good debater. i'm just okay. >> romney fit in another rehearsal after church in boston on sunday. he's been practicing since june. paul ryan says this will not be a defining moment. >> i don't think one event is going to make or break this campaign. >> but apparently not everyone got the memo. >> for thursday morning you are all going to be scratching your heads and saying wow we have a barn burner. >> wednesday's debate will center on domestic issues including the economy. romney is focused on foreign policy and slamming the president over his handling of the events in the middle east. romney s